In Acrobat Pro XI, want to turn on/turn off (visible/invisible) at run time. Based on certain circumstances, want the button property (button called "Validate" ) to be visible. Once the button is selected and the action run, want the button property to switch to invisible. Need help with the code to change the status of the button (action behind the scenes works fine). Thanks!

Basically you would set the display property of the button field to show/hide it, but you'll need to provide more information about the exact conditions you want to use and what you want to use as the trigger, if you want more detailed help.

EmplAge is a text field. The field is populated from calculcations from a number of date fields. If EmplAge is greater than or = to 65, then I would like the Validate button to turn visible (show) . If the condition is not met, then the Validate button never appears.